Collapsible core



A'gm 22 1924.

' MATTM CORE COLLAPS I BLE 5 Sheets-Sheet 2 Filed June 2l. 1925 ASLGSZ P. DE. MATTiA COLLAPSIBLEl CORE pri 22 1924.

Filed June 2l. 1923 5 Sheets-Sheet 5 TEE.

5o/4255, z i mvgww si El A TTRVEYS racks 7 of the Shanks 6.

mounted to turn freely the lower ends of` shafts 13, the said shafts 113 being also supported in bea-rings 14 positioned at the outer lor upper end of the casting 9, and they are held in place by the nuts 15 received in sockets 16 at the base of the casting, and also by the worms 17 which are secured to the shafts 13 by means of collars 18 pinned to the said shafts by the dowels 19, the worms 17 being in` mesh with the worm The shafts 13 at their upper ends are provded with po-` l lygonal extensions 20 whereby they may be engaged by a suitable wrench and turned, and thus through the Worm and worm gear connections move the Shanks 6 and the core sect-ions 1, and 2 connected to or carried thereby. As shown in Fig. 5, the shafts 13 arev arranged to be turned independently, and thus one of the sections 1 or 2 may be moved independently o1E the other, but if it be desired that the sections be simultaneously moved, then the arrangement shown in Figs. 7 and 8 may .be employed. Thisconsists of a gear 21 xedly secured to eac-h of the polygonal extensions y20 oli-the shafts 13, the `gears' 21 meshing with an intermediate gear 22 mounted'toy loosely turn about the sha "t'23 supported centrally betweenthe shafts 13 and held in place by a collar 24 carried by the shaft 23. This arrangement is suc-h that by fitting the key to either one ofther polygonalk extensions 20 and turning the shaft 13, to which the key is fitted, will result in the simultaneousrotation of the'other shaft/13, and thus a simultaneous movement of the'core sections 1 and 2 will be ell'ected. As shown in dotted lines in Fig. 5, thesecore sections,byreasfon of the curved shank 6, have a movement in a curved line toward and from the position of operative continuity, and `into and out o'f the plane of operative continuity. l

The core sections Sand 4.a.re provided with straight Shanks 25 extending obliquely or inclined to the planeof'operative continuity, and in a direction opposite to that at which the Shanks 6 extend. v The shafts 25 are fitted to have a rfree sliding movement in bearings' 26 formed partially inthe c asting 9 and in oppositely diverglng p1 'o]ect1ons 27 extending `from the forward end of the,r

said casting, the Shanks 25 being.,lr held therein by means of cover plates 27 fixed 1n position over the Shanks and over the bearings land 2,-,then ,by turning thevwvorr'n 30 an intraitee for the shafts 13. are carried by these cover plates. The shanks 25 cross each other upon a line coincident with the axis of the casting 9, and upon the opposed inner facesthey are provided with inclined rack 'teeth 29 engaging and meshing with a Worm 30 mounted in a bearing 31 in the outer end of I 26 by means ofscrews 28. Thebearings 14:

the casting 9 and held therein by a bushing 32 which engages a threaded recess in the outer end of the said casting. The worm 30 is provided with a polygonal extension 33 whereby it may be'turned and thus impart to the Shanks 25 movement in opposite directions in the bearings 26, a turning of the worm 30 in one direction causing the Shanks 25 to draw thefsections 3 and 4 towards each other in an oblique or inclined line, and a movement in the opposite direction results in a movement of the sections 3 and {1f/outwardly on an inclined or oblique line, the result of this movement moving lthe core secs tions 3 and 4 not only with relation to the position of operative,y continuity but with relation to the plane of operative continuity, and as will be clearly understood, the movement of the sections 3 and 4 with relation to the plane of operative continuity will be in adirection opposite to that of the movement imparted to the sections 1 and 2 with relation to the lane of operative continuity.

The core an the casting which supports the same, ,which is technically known as a chuck in this art, are intended te be mounted so that `the core may be freely turned about a centercoinciding with the axis of the casting;` land for this purpose-the casting is providedw-ith a socket 34 whereby it may be supported upon'a spindle car? ried by a j ack or .other support v(notshowni. In operation, assuming:l thatuthe parts are n-the position shown -in, Fig. 1,' .wherein the core sections are not `only in the position ,of operative continuity but also in the same plane or the plane of operative continuity, and that a tire shoe creasing has been built up thereon 4and. is ready ,to bercmoved therefrom, the `first operation is to remove the sections 1, and-2 from thecore,

kand this may be' accomplished either by moving them separatelyor simultaneously,' such movement helng accomplished by the A`turning of the shafts 13, thus. through, the

worms 17 and the :worm racks 7 drawing the core sect-ions 1, and 2 inwardly and rearwardly on curved lines. Untilthe sections 1 and 2 have been withdrawn, itrwill of course be impossible to move the sections 3 and 4. Having withdrawn the sections 1 Ward rand outward movement will be imparted to the sections 3 and' 4.. When moved tothe maximum extent, the core lsections will be approximately in the position shown in Fig. 6, whereinthe sections and `4; are 13 mensen and readily removable therefrom. W hen re moved, a reverse operation ot the worm 3() returns the sections 3 and il to the position of, and plane of, operative continuity, after which a reverse operation ot the shafts i3 moves the sections l and 2 into position between the sections 3 and 4: and the position of, and plane of, operative continuity.

l claim:

l. A collapsible corey comprising a plurality of segmental core sections, a support therefor, and means for movably connecting one of the core sections with the supportfor movement in a curved path into and out of the position of operative continuity and with relation to the plane of operative continuity.

2. A collapsible core comprising a plurality oi segmental core sections, a support therefor, means for movably connecting,` a pair of said core sections With the support :tor movement in opposite directions into and out of the plane of ope` ative continuity, one of said sections being movable in an oblique direction and the other oi' said sections loeingfr movable in a curved path.

3. A collapsible core comprising a plurality of segmental core sections, a support therefor, means for movably connecting a pair of the core sections With the support for movement in a `curved path into and out of the position of operative continuity` and with relation to the plane of operative continuity, and means for simultaneousl moving said pair of core sections.

4. A collapsible core comprising a plurality of segmental core sections, one of said sections being provided with a carved shank, a guide in which the said shank is arranged to move, and means 'for moving the said.

shank in said guide. A

Awcollapsible core comprising a plurality of segmental. core sections, a su port therefor, means to move a diarnetricalppair of said sections in a curved path into and out of the position of operative continuity and the plane of operative continuity, and means for moving a diametrical pair of said sections in a straight path obliquely inclined to the plane of operative continuity.

6. A collapsible core comprising a pinrality of segmental core sections, a su sport therefore., means to move a diametricai pair of said sections in a curved path into .and out of the position orn operative continuity and the plane of operative continuity, and means for moving a diametrical pair of said sections in a straigli' path obliqnely inclined to the plane of operative continuit@ such movement with relation to the plane 'o operative continuity being in a direction op posite to that of the rst pair.

7. A collapsible core comprising tvvo pairs of segmental core sections, one pair of said sections fitting between the ends ci@ the other pair of said sections, means Afor moving the inner pair ot' the core sections in a carved path into and ont ofthe osition of operative continuity and the Kp ane ot operative continuity in one direction, and moans to movev the other pair oolisuely into and out of the position oit operative continuity and the plane of operative continuity, the move ment with relation to the plane of operative continuity being in a direction opposite to lthat ot the inner pair of core sections.

8. A collapsible core comprising a centrally disposed support, hearings at or near the opposite ends of said support, a pair of core sections provided with straight Shanks disposed in the hearings at or :near one end of the support, and a pair of core sections liaving'curved Shanks disposed in curved bearings at or near tile opposite end o the support', and means engaging the said Shanks to impart movement thereto and to the core sections supported thereby.

9. A collapsible core comprising a central support, a pail. of curved bearings at or near one end of the said support, a j air o core sections provided with curved s -anlrs tted into the said curved bearings, a 'Worm rack carried by said curved Shanks, Worms en- 'gaging said racks, shafts npon which said Worms are mounted extending and project ing at the 'forward end of the support and provided with means whereby the said Shanks can loe rotated.

ist

. 10. A collapsible core comprising a cen- 

